Lock-nut.



J. M. THOMPSON.

LOCK NUT.

APPLICATION FILED JULY 17. 1914.

Patented Nov. 2, 1915.

' atbozmu STAT S PATENT ens on, v

JAMES M. THOMPSON, OF MQNESSEN, PENNSYLVANIA. I

l tocK-iv T.

Specification of Letters ]Pa1;ent.

.- Patented Nov. 2,1915

' Application m July 17, 1914. Serial No. 851,589. 1

To all whom it may concern: I

Be it known that I, J AMES M. THOMPSON,

a citizen of the United'States, residing at Monessen, in the county ofWestmoreland and State of Pennsylvania, have lnvented new and usefulImprovements in Lock-Nuts,

of which the following is a specification.

The present invention relates to improvements in means for effectivelylocking a nut upon a bolt to prevent the accidental dis association ofthe said nut and bolt.

'In carrying out my invention I propose to provide a lock of thischaracter which shall be of simple construction, cheap to manufacture,easily and quickly applied and which shall be thoroughly efficient.

WVith the above and other objects in view, the invention resides in theconstruction, combination and operative arrangement of parts set forthin the following specification and falling within the scope oftheappended claims.

The drawings illustrate a simple and satisof the same, and Fig. 6 is anelevation looking toward the rear face of the nut.

While I have illustrated mv improvement in connection with a rail joint,it is to be understood that the same is not to be thus limited initsuseful application, as the improvement may be applied with equalciliciency upon all structures wherein it is desirable or essential thatthe connecting nut and bolt be retained locked against accidentalseparation fromvibration or from any other cause. 7

Referring now to the'drawing in detail, the numeral 1 designates a railof the ordinary construction, 22 the fish plates which engage with theopposite sides of the rail, 3 the bolt which passes through suitableopenings in the fish plates and in the web of the rail, and 4 the nutfor the bolt. In

the present instance the fish plates 2 are channeled upon both theirinner and outer 1 faces, and the head of the bolt 3 is of a width toengage with the beads formed by the channel upon the outer face of oneof the fish plates 2. v

- The numeral 5 designates a substantially rectangular plate which isconstructed of some-spring material and which has its edges, upon itsinner face, beveled or inclined, as indicated by the numeral 6, the said.beveled edges contacting with the angularopposite faces of the beadsformed upon the outer face of the second fish plate.

{The plate 5 has its inner face-dished or de-, 'pressed,,as indicated bythe numeral 7, and

if desired, and as illustrated in the draw ing, the angular or beveledportion 6 may beprovided upon'only two of the opposite ed es oftheplate.- 'lheplate is provided with -a bolt opening 8 through which theshank of the bolt 3 -passes,and'the outer face of the plate is formedwith depressions orpockets 9, preferablytwo [1n 'numberarrangeddiametrically opposite each other. By dishing or depressing theinner'face of the plate 5, the central portion thereof is renderedyieldable for a reason which will presently be described.

The numerallO designates a spring ring or washer member, the same havingits inner face formed withlugs 11 which are adapted to be receivedwithin the pockets 9, and the outer face of the said member 10 is formedwith teeth 12 which radiate from the center of the, said member.

The nut 4 of any ordinaryv construction, but has lts inner face providedwith teeth 14 which radiate from the center thereof,

and which are preferably arranged concentrio of the bore of the saidnut. When the nut 4: is screwed upon the threaded shank of the bolt 3,after the members 5 and 10 have been assoclated, as above described, the

teeth:12 of the spring member 10. The angular or beveled ends or edges 6of the plate v5 will be forced tightly against the opposite angularwalls provided by the beads-of the fish plate 2, causing the centralportion of the plate to bulge outwardly,

which movement forces the spring member or washer 10 toward the nuteftecting a bind- 'teeth 14 of the nut 13 will ratchet over the ingaction between theteeth'of the member 10 and the teeth of the nut.

Vhat is claimed is:

1. The combinationwith a spring plate having opposite angular edges andits inner face depressed between the said'angular edges, a bolt passingthrough an openlng in the plate, the outer face of the plate beingformed with depressions, a spring member having a bolt opening and oneof itsfaces provided with lugs which engage in the ole pressions of theplate, the outer face of the said spring member having teeth which radi-7 ate from its center, a nut for the bolt, and said nut having its innerface formed with teeth which engage with the teeth of the '1 springmember when the nut is screwed home upon the bolt.

2. The combination with rails, of a fish platefor the rails, said fishplate having its outer face depressed to provide heads, the s t ide f Whar lin d, and. a

,bolt passing through openings in the rails and fish plate, of a springplate having opposite angular edges which contact with the angular facesof the beads of the fish plate,

' the said spring plate havinga bolt opening to receive the bolt and itsinner face channeled between its angular edges, the outer face of thesaid spring plate being formed with depressions, a spring member havinga l sp ing a d ts nn ace Pr v ed with lugs which are received within thedepressions of the plate, the outer face of the id sp ng me be h ng t eta u r the bolt, and said nut having its inner face provided with teethwhich ratchet over the which reeeived within the depressions of t eell-r g Plat and t ut r face P vided with teeth which radiate from thecenter of saidv ring, and a nut engaging the bolt and having its innerface provided with radially disposed teeth which co-act with the teethof said ring member,

n tes many wh re f I afi y a anepres nce o We wltn es- JAMES M;THOMEPSQN.

, ll itnesses;

Pe VlLL Females Meson Ane ia Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents.

" i I Washington, G.

